Yasushi Onizaki

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Perlite sound absorbing plate and sound insulating wall composed of...
- Patent number 4,160,491
- Issue date Jul 10, 1979
- Bridgestone Tire Co., Ltd.
- Masayasu Matsumoto
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES